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Phase-noise measurement using two inter-injection-locked microwave oscillators

Nick, M ; Sharif University of Technology | 2006

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  1. Type of Document: Article
  2. DOI: 10.1109/TMTT.2006.877423
  3. Publisher: 2006
  4. Abstract:
  5. Phase noise in two mutually coupled oscillators is analyzed by the describing function method, and the after-lock phase noise of the oscillators is calculated in terms of their free-running phase noise. A new phase-noise measurement technique based on inter-injection locking of two similar oscillators is proposed. Experimental results are presented, which confirm the theory. It is shown that in the case of zero phase of coupling coefficient, the system is in the optimum state where the only required parameter for the measurement is the locking bandwidth. In this optimum state, as far as the locking bandwidth is measured correctly, imperfections such as the frequency drift, parameters discrepancy, and nonlinear susceptance of the oscillators have no serious effect on the measurement accuracy. The proposed method is compared to the conventional ones. © 2006 IEEE
  6. Keywords:
  7. Describing function ; Inter-injection locking ; Microwave oscillator ; Phase noise ; Phase-noise measurement ; Acoustic noise ; Bandwidth ; Electron energy levels ; Function evaluation ; Parameter estimation ; Microwave oscillators
  8. Source: IEEE Transactions on Microwave Theory and Techniques ; Volume 54, Issue 7 , 2006 , Pages 2993-3000 ; 00189480 (ISSN)
  9. URL: https://ieeexplore.ieee.org/document/1650439